Please unblock git-buildpackage 0.5.4

[Guido Günther <agx@sigxcpu.org>]

Hi,
please unblock the above version. It fixes a nasty bug regarding dsc
imports (which didn't get reported to the bts though):

 * [f63c4ed] git-import-dsc: Don't add superfluous parents to imports on the
    Debian branch. Only set a parent on the first import per upstream version.

has doc updates:

 * [407b614] docs: Drop git_load_dirs reference we're not using it anymore.
 * [dbc7fe3] docs: We don't only support .gz tarballs

And minor updates:

 * [88afa61] git-dch: Pass --multimaint-merge on to dch (Closes: #586165)
 * [e8b6b49] gbp-pq: Use the maintainer of the Debian package as fallback
    patch author
 * [af2a435] gbp-pull: Don't update already up to date branches

Since this is a leaf package with no reverse dependencies it should be
safe.
Cheers,
 -- Guido